Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5ab9f90a8dec34383255e3de1455ab80a0bb2680565869cc1da0bebeb24867f7' 
  AND token = 'EjedhZsHhZgNEo73elRtW3ST5cr9RWc8Ej5EhIdGAMY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00049

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}